Machine for wrapping and applying a wrapper to tobacco fillers



De- 6, 1960 AKE R. sKRsTRM 2,953,025

MACHINE FOR WRAPPING AND .l-XPFLYING A WRAPPER TO TOBACCO FILLERS Filed DeG. 12, 1958 o n \I VENToR B i 144k@ ZZA/aandrang United States Patent MACHINE FR WRAPPING AND APPLYING A WRAPPER TO TOBACCO FILLERS ke R. Skrstrm, Stockholm-Vallingby, Sweden, assignor to Arenco Aktiebolag, Stockholm, Sweden, a firm of Sweden Filed Dec. 12, 1958, Ser. No. 780,066

`Claims priority, application Sweden Dec. 16, 1957 6 Claims. (Cl. 13152) The present invention relates to machines for wrapping tobacco fillers so as to form cigars or tobacco products having the configurations of cigarettes.

In the operation of such machines a bunching roller cooperates with a rolling apron upon a rolling table so that the apron with an S-shaped loop encloses the roller at its top portion and the tobacco ller at its lower portion with a mouth directed forwardly in the rolling direction. When producing cigar bunches the apron is likely to jam the tobacco filler and squeeze small particles thereof outof such mouth onto the binder placed on the apron in front of the mouth whereby such tobacco particles might be embedded in the binder which is to bewound on the filler. Furthermore, in the manufacture of such tobacco articles the edge or the end of the binder or wrapper first engaging the togacco filler is likely to be raised by the air from the mouth and be bent upon itself by the advancing tobacco filler.l Aho,

it may happen that such edge or end which is in'tially applied to the tobacco filler is likely to get loose therefrom and be bent back on itself then being covered by a succeeding portion of the binder or wrapper. It is an object of the invention to remove such drawbacks.

It is a further object of the invention to provfde Ia mechanism wherein the binder or wrapper is positively applied tothe filler during the Wrapping thereof about the filler. I -Y With the above and other objects in view which are apparent from the detailed description below the invention consists in certain constructions and combinat'ons of elements hereinafter fully described, claimed in the claims and shown in the drawings in which:

Figure 1 is a front elevational view of a cigar bunching machine embodying the invention.

Figure 2 is a side elevational view partly in section taken upon section line 2-2 of Figure 1.

Figure 3 is an enlarged cross-sectional view taken through the apron roller illustrating the formation of the filler.

Figure 4 is an enlarged view of the apron roller with parts in section, and

Figure 5 is a view similar to Figure 4 of a modification.

In the drawings, similar reference characters indicate like parts in the various views and the term forwardly in the following description denotes a movement to the left in Figures 2 and 3.

l The cigar bunching machine is provided with a rolling apron 2 secured to the rolling table 1. The b'nder B shown more particularly in Figures 4 and 5 is placed upon the? rolling table 1 in the manner shown and wound by means of the bunching roller 3 cooperating w'th the apron 2-about the tobacco filler F when the bunching roller is moved forwardly on the rolling table.

The rolling apron 2 is secured to the front edge of the rolling table 1 and to the rear thereof with a cavty 4 in the rolling table wherein there is formed periodically a pocket for receiving the tobacco for the filler F from 2,963,025 Patented Dec. 6, 1960 a magazine 5. The bunching roller 3 is rotatably mounted in the forked upper end of the lever 6 wh'chl is rotatably mounted on a shaft 7 secured to the machine frame 8. Upon the lever 6 there is provided a cam roller 9 which engages in a cam groove 10 prov'ded in a cam 11 secured to the drive shaft 42 rotatably mounted in the frame 8. The cam groove 10 is of such shape that the lever 6 will periodically move the bunching roller 3 forwardly upon the rolling table 1.

In this movement as particularly shown in Figure 3 the roller 3 will be enclosed in the upper section L1 of an S-shaped looped portion L of the apron 2 while the roller section L2 encloses the tobacco filler F and compresses and concentrates the same. In the forward movement the loop L will have a tendency to force air and small tobacco particles out of the mouth l2 formed by the apron below the bunching roller 3. The jet of air leaving the loop L through the mouth 12 has a tendency to raise and blow up the rear edge B1 of the binder or wrapper B particularly at the corner B2. Therefore this edge or corner may be bent upon itself by the advancing tobacco filler F and small tobacco particles are likely to deposit on the binder and be embedded in the convolutions of the same. v The above drawbacks and disadvantages will be removed by the present invention and at the same time the binder or wrapper will be applied positively tothe tobacco filler. The bunching roller 3 is utilized f-or directing jets of air into the lower looped portion of the rolling apron 2. Provision is made not only for counteractng the tendency to force air and small tobacco particles outl of the mouth 12 but also to prevent the binder edge B1y or its corner B2 from getting loose from the tobacco filler F after having been applied thereto. Positive means are provided for applving the wrapper to the ller during the wrapping of the binder about the fillfr.

The bunching roller 3 has a tubular portion 44, Figures 4 and 5, which is rotatably mounted on aY narrowed portion 43a of a spindle 43 whose larger end 43b is enclosed in the tubular portion 44. The tubular portion 44 has radial air outlet openings 45 arranged angularly, The spindle 43 is rigidly mounted on one leg 46 of the forked upper end of the lever 6 and it has a central axial bore 21. At its other end the bunching roller 3 is rotatably mounted on a pin 49 fixed to the other lee 47 of the lever 6. Appropriate ball bearings are provided.

In the construction shown in Figure 4V the-` bunching roller 3 is provided with a single peripheral annular row of airblast openings 45 which register consecutively with a Vradial airblast opening 80 provided in the spindle 43 when the bunching roller 3 rotates thereon. The opening 80 is directed obliquely downwardly and rearwardly towards the front end of the lower portion L2 of the,` apron loop L as more particularly shown in Figure 3. The opening 80 communicates with the bore 21 of the spindle 43. The bore 21 is connected at the narrow end 43a of the spindle 43 to a flexible hose 22.

'The hose 22 as shown in Figures l and 2 is provided with a valve 23 of conventional type for controlling the flow of air and it is connected through a valve 24 to the pressure side of a fan, not shown. A support 25 is'v secured tol the shaft 7 for supporting thev valve` As shown in Figures 3, 4 and 5 the rolling apron 2 is provided with perforations 33 through which air may' be ejected from the openings 45 of the bunching roller 3. The perforations may be circular or have any other approprate shape. They can, for example, be shaped as slots extending longitudinally of the rolling apron as shown at 33a. The perforation 33a which is designed to let through a jet of air against the downwardly directed binder corner B2, see Figure 3, should be relatively long.

When the advancing bunching roller 3 and the tobacco filler F have reached the relative positions as shown in Figure 3 and the binder or Wrapper corner B2 has been partially wound about the filler and is directed downwardly as shown in Figure 3 the valve 24 controlled by the cam 32 is opened so that compressed air will be conveyed through the hose 22 and the spindle bore 21 and be blown out of the opening or openings 45 which have just registered with the spindle opening 80, The air expelled through the opening or openings 45 flows through the apron perforations 33 or the slot 33a and is projected against the binder corner B2 thereby forcing the latter into tight engagement with the tobacco filler F at the same time as the jet of air returns any tobacco dust and particles that might have been squeezed out of the tobacco filler from the apron mouth 12. There is therefore in addition to returning the tobacco dust and particles and in addition to maintaining the forward corner B2 in proper position the additional function of applying such corner tightly against the tobacco ller after the wrapper has been partially wrapped about the filler.

In the embodiment shown in Figure 5 the bunching roller 3 is provided with a plurality of peripheral annular rows of blast openings 45 for projecting a row of air jets onto the tobacco filler F and the binder corner B2 and adjacent portions of the binder edge B1. In this embodiment the rolling apron 2 has a corresponding number of longitudinal rows of perforations 33 and 33a and the spindle 43 has a long slot or a plurality of openings 80 each registering with one of the peripheral annular rows of openings 45 in the bunching roller sleeve 44. If a slot is used it should taper conveniently in a direction against the closed end of the spindle bore 21. Also when using a longitudinal row of openings 80 instead their diameter should decrease according as their distances from the closed end of the bore decreases.

It is thought that the invention and its advantages will be understood from the foregoing description and it is apparent that various changes may be made -in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing its material advantages, the forms hereinbefore described and illustrated in the drawings being merely preferred embodiments thereof.

I claim:

1. A machine for wrapping tobacco fillers or the like in binders or Wrappers, comprising a rolling table, a rolling apron having perforations mounted on said table, a tubular bunching roller having air outlet openings arranged annularly, means for supplying compressed air to said outlet openings, means for periodically advancing said bunching roller on said table for operating said apron to enclose said roller and a tobacco filler by an S-shaped loop to wrap said tobacco filler into a wrapper placed on said apron and means connecting said bunching roller to a vsupply of compressed air for projecting jets of air through said outlet openings and through the perforations of said apron into the portion of said loop enclosing said filler.

2. A machine for wrapping tobacco fillers or the like in binders or wrappers, comprising a rolling table, a rolling apron having perforations mounted on said table, a tubular bunching roller, means for periodically advancing said bunching roller on said table for operating said apron to enclose said roller and a tobacco iller by an S-shaped loop to wrap said tobacco filler into a wrapper placed on said apron, and a xed hollow spindle having a blast opening, said bunching roller being rotatably mounted on said spindle and haivng air outlet openings arranged annularly to consecutively cornmunicate with said blast opening when it rotates on said spindle, means for supplying compressed air to said hollow spindle to project jets of air by said blast opening through the outlet openings of said roller and further through the perforations of said apron into the portion of said apron loop enclosing said tobacco filler.

3. A machine for wrapping tobacco llers or the like in binders or Wrappers, comprising a rolling table, a rolling apron having perforations mounted on said table, a tubular bunching roller, means for periodically advancing said bunching roller on said table for operating said apron to enclose said roller and a tobacco filler, by an S-shaped loop to wrap said filler into a wrapper, placed on said apron, and a iixed hollow spindle having a blast opening directed obliquely downwardly against said rolling table, said bunching roller being rotatably mounted on said spindle and having air outlet openings arranged annularly to consecutively communicate with said blast opening when said roller rotates on said spindle, means for supplying compressed air to said hollow spindle to project jets of air through said blast opening and through the outlet openings of said roller and further through the perforations of said apron into the portion of said apron loop enclosing said tobacco filler.

4. A machine for wrapping tobacco fillers or the like in wrappers comprising a rolling table, a rolling apron having perforations therein mounted on said table, a bunching roller having perforations therein cooperating with said rolling apron, means for advancing said bunching roller on said table for operating said apron to enclose said roller and a tobacco liller in an S-shaped loop to wrap said filler into a wrapper placed on said apron, and compressed air means operating through said perforations in said roller and apron for directing loose tobacco particles towards said filler,l applying the forward end of said wrapper against said apron and then after said wrapper is partially Wrapped applying said wrapper against said filler.

5. A machine for Wrapping tobacco fillers or the like in wrappers, comprising, a rolling table, a rolling apron having a perforation therein on said table, a bunching roller having a blasting opening therein extending radially thereof, means for advancing said bunching roller on said table for operating said apron to enclose said roller and a tobacco ller in an S-shaped loop to wrap said ller into a wrapper placed on said apron, and means for supplying a gaseous pressure uid to said blasting opening so that when said perforation is in alignment therewith said uid Will direct loose tobacco particles towards said filler.

6. A machine for wrapping tobacco llers or the like in wrappers comprising a rolling table, a rolling apron having a perforation therein on said table, a bunching roller having a blasting opening therein extending radially thereof, means for advancing said bunching roller on said table for operating said apron to enclose said roller and a tobacco iiller in an S-shaped loop to Wrap said filler into a wrapper placed on said apron, and means for supplying a gaseous pressure fluid at predetermined intervals to said blasting opening so that when said perforation is in alignment therewith said uid will direct loose tobacco particles towards said filler.

References Cited in the le of this patent UNlTED STATES PATENTS 2,917,053 Bair Ian. 20, 1958 

